All Women Have Secrets affords a rare film starring role for James Cagney's talented sister Jeanne Cagney. Set on a college campus, the story concerns the trials and tribulations of married student John (Joseph Allen) and his pregnant wife Kay (Cagney). In addition to their existing financial woes, Kay faces dismissal from her nightclub singing job as her waistline expands. The "secret" refers to the fact that Kay has been withholding the fact that John is about to become a father , lest he offer to quit school to support them both. Some much-needed laughs are provided by Peter Lynd Hayes as the typical campus cutup.